3255 papers
Quantum gravity represents the frontier where the very large meets the very small, attempting to unify Einstein's theory of gravity with the strange rules of quantum mechanics. This field explores the fundamental fabric of spacetime, seeking to understand how the universe behaves at its most extreme scales, from the heart of black holes to the moment of the Big Bang. Because these concepts often involve complex mathematics, they can feel distant to non-specialists, yet they hold the key to a complete picture of physical reality.
At Gist.Science, we bridge this gap by processing every new preprint in this category directly from arXiv. Our team provides both plain-language explanations and detailed technical summaries for each paper, ensuring that groundbreaking research is accessible to everyone, from curious students to seasoned researchers. Below are the latest papers in quantum gravity, offering fresh insights into the nature of our cosmos.
This paper argues that Nishida Kitaro's philosophical concept of *basho* offers a valuable framework for rethinking the nature of points in quantum spacetime and noncommutative geometry within the context of quantum gravity.
This paper formulates a generalized -essence model within Palatini gravity, establishes conditions to avoid Ostrogradsky instabilities, and employs a dynamical system analysis to reveal cosmological evolution scenarios featuring de-Sitter epochs, scaling solutions, and quintessence phases connected by heteroclinic orbits.
This paper proposes a holographic correspondence where the observed cosmic acceleration, traditionally attributed to a cosmological constant, is instead explained as an entropic effect arising from the thermodynamic properties of the boundary's quantum degrees of freedom, a model known as GREA that predicts distinct deviations from the standard CDM model in the growth of large-scale structures testable by upcoming surveys.
This paper presents an independent re-analysis of DESI DR1 data using full-shape power spectrum and bispectrum measurements to derive robust, CMB-independent constraints on spatial curvature, dark energy dynamics, and neutrino masses, demonstrating significant improvements in cosmological parameter limits compared to standard BAO-only analyses.
This paper presents a Python-based framework using the Cross-Correlation Algorithm (CoCoA) to estimate the sensitivity of triggered searches for intermediate-duration post-merger gravitational waves from long-lived neutron star remnants across current and next-generation detector networks, aiming to optimize future search strategies by balancing sensitivity with computational cost.
This paper investigates how the presence of a massless topological shell within a neutron star alters its equilibrium structure and radial oscillation modes, revealing distinct, non-monotonic gravitational-wave signatures that may be detectable by current and future observatories like Advanced LIGO and the Einstein Telescope.
This paper presents a model-independent framework that uses cosmic chronometer measurements of the Hubble parameter to directly reconstruct the background effective field theory functions of dark energy, enabling the testing of various cosmological models and the constraint of specific theories like quintessence without assuming a predefined scenario.
This paper presents a unified analytic study demonstrating that regular black holes generically possess nonvanishing, scale-dependent tidal Love numbers that encode distinct fingerprints of their internal structures and quantum-gravity modifications, offering a potential observational window to distinguish them from classical black holes.
This paper investigates classical solutions for non-vacuum and vacuum anisotropic Bianchi Type I cosmological models within gravity theories, utilizing a Hamiltonian approach with a barotropic fluid to derive results in two specific gauges that often serve as ansatzes for solving Einstein field equations.
This paper investigates two metric gravity models using binned Type Ia Supernovae data to explain the effective running of the Hubble constant, demonstrating that while a general phenomenological fit is possible, it yields unphysical scalar field masses unless an additional condition is imposed to restore a consistent Cauchy problem and ensure a finite, positive scalar field mass.